1.Definition Chest deep breathing training, the purpose is to increase lung capacity, so that the chest cavity fully expanded. 2, indications and contraindications (1) indications: spinal cord injury, chronic bronchial emphysema or obstructive pulmonary disease, severe scoliosis or Jiangsu Provincial Hospital of Traditional Chinese Medicine and Acupuncture Rehabilitation Department celiac posterior convexity resulting in respiratory dysfunction, etc. (2) Contraindications: unstable clinical condition, uncontrolled infection, respiratory failure, other clinical conditions that can lead to deterioration during training, severe cognitive deficits and mental illnesses that affect memory and compliance. 3.Equipment and appliances No equipment is required. 4.Operating methods and steps During training, the patient is in a relaxed position, then inhale deeply through the nose, and at the end of inhalation, hold the breath for a few seconds in order to have enough time for gas exchange and to give the partially collapsed alveoli a chance to re-expand; then exhale the gas slowly through the mouth, which can be combined with the lip contraction breathing technique to make the gas fully expelled. 5.Cautions When training, pay attention to avoid excessive shrugging of the shoulders, the remaining reference resistance exhalation training.